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single phase via 3 phase


Jan Breet
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There are various reasons why getting a solar pump would be better.

 

Power factor, current requirements.

 

Three phase may well be more efficient which is important for solar. But it will cost a lot more inverter wise.

 

But a bad power factor will be really, really wasteful in which case an actual solar pump would be far better choice.

 

Power factor in 3 phase motors can easily be a problem, hence mentioning it.

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If there is already 2phase power at the pump

 

The all have 3 phase motors on their bore holes.

If there is 3 phase already at the pump, why not use that in case of emergency?

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Rural Eskom users pay through the nose - sometimes R2500 -R3000 in line fees, levies etc. BEFORE you have used a SINGLE unit of power. If you are going solar under these circumstances you do not want to maintain your Eskom connection for the "what-if" scenarios. You plow that R2500 into your installation and make other alternatives for rainy days.

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  • 1 year later...

I have the same problem and looking into Three-Phase VSD Solar Pump Controller MicroCare has one. You do need a VSD compatable drive.

The other option I found was at www.fullcirclesolar.co.za  -- They have one that runs on all moters.

Down side is that they all need around 500V ( Lots of panels ) 

Still worth it as the Eskom pump point alone coasts me R1800 a month.

 

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  • 2 weeks later...
  • 2 weeks later...
On 5/2/2017 at 0:00 PM, jacobez said:

An option would be to replace the 3P DOL starters with a 1P input - 3P ouput VSD.

We ended up installed 3x 5KVA Axpert inverters + solar panels, which then could be used for other purposes as well. Other brands could also be used but this was the cheapest option. 

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